496939367925domain: NAppears in sequencesFourth column (m=3) of the Laguerre-Sonin a=1/2 coefficient triangle.at n=8A130563a(n) = n! * 2^(-n) * binomial(3*n - 1, 2*n) * binomial(2*n, n). Central terms of the Bessel triangle A132062.at n=8A376872